Yegor Grol

Sorting centers for Yandex Market project:

Java Spring Boot Postgres Hibernate

Search Engine and Recommendations project:

• Provides customers and store employees with an opportunity to search by product data in various publication channels (site, mobile apps - for external and internal users).
• Provides various types of searching (including full-text search by product data, search by product id, by product barcode and so on), aggregating, filtering, and ranking search results.
• “Search Engine” is the most loaded service at Leroy Merlin (up to 600 qps for search queries, up to 1500 qps for autocompletion).
• Highly critical for business. If the system is down, it leads to very high costs for the business due to the fact that searching is the first step for customer experience.
• Low latency and High Availability are crucial (99th percentile for response time: 300 ms, 99.99% availability)

You can check it here: leroymerlin.ru

Kotlin Spring Boot Kafka Elasticsearch MongoDB Kubernetes Python Flask Catboost ClickHouse Airflow

Business Travel project.

I was involved in development of a backend service for business travel application that facilitates logistics planning. It recommends the most optimal means of transportation and hotel accommodations, makes all necessary reservations, including all kinds of transfers to or from railway stations, airports, hotels, etc. It also supports creating travel policies for a particular company, notifications, reports etc.

Check it out: center.travel

Kotlin Spring Boot Spring Reactor WebFlux RabbitMQ MongoDB Kubernetes

Small Business Monitoring project

I was involved in development of various tools for software developers who create a solution for small businesses monitoring based on the Pega BPM system

Improved deployment frequency, faster time to market, lower failure rate of new releases, shortened lead time between fixes, faster mean time to recovery (in the event of a new release crashing or otherwise disabling the current system).

Pega BPM Oracle Liquibase Groovy (building CI/CD pipelines) Docker Maven (writing custom plugins) Ansible Micrometer Prometheus Grafana

Resource Management Component project

I was involved in development of Data Warehouse for Deutsche Telekom Inventory (building ETL process, data reconciliation, etc.)

Java Oracle

Theoretical foundations of computer security and cryptography

Master’s degree in cryptography